Genetic and environmental influences on the relation between attention problems and attention deficit hyperactivity disorder
Behavior Genetics (2008) - Comment
pubmed: 18074222  doi: 10.1007/s10519-007-9178-8  issn: 0001-8244  issn: 1573-3297 

Eske M. Derks, James J. Hudziak, Conor V. Dolan, Toos C. E. M. Van Beijsterveldt, Frank C. Verhulst, Dorret I. Boomsma